Part I: Reports

Reports of engagements, actions, battles, maneuvers, etc., written by an officer to an officer.  Included are post war reports requested by the Adjutant General, eyewitness accounts of engagements otherwise infrequently described, and accounts supplying substantive supplemental material, including court-martials, courts of inquiry and proceedings.

Volume

O.R. Vol.

O.R. Serial No.

1

Volumes 1-10

(serial nos. 1-10)

2

Volumes 11-12

(serial nos. 12-13, 15-16)

3

Volumes 13-21

(serial nos. 19-22, 24, 26-29, 31)

4

Volumes 22-26

(serial nos. 32, 34, 36-37, 39, 41)

5

Volumes 27-30

(serial nos. 43-44, 46, 48, 50-51)

6

Volumes 31-37

(serial nos. 54-55, 57, 60, 61, 65, 67-68, 70)

7

Volumes 38-50

(serial nos. 72-74, 77, 80, 83, 87, 90, 92, 93, 95, 98, 101, 103, 105)

Volume

Serial No.

Contents

8

Serial no. 8

Warren Court of Inquiry

9

Serial no. 9

Proceedings, findings, and opinions of the Court of Inquiry ... in the case of Gouverneur K. Warren, part II

10

Serial no. 10 

Court-martial proceedings of Lieutenant-Colonel Robert G. Morrison, 34th Indiana Veteran Volunteer Infantry (Volume 48, serial no. 101); Report of Albert James Myer, Union Chief Signal Officer, of the Operations and Duties of the Signal Department of the Army, 1860-1865

11

Serial no. 11

Index, A-L

12

Serial no. 12

Index, M-Z.

Part II: Record of Events & Itineraries

Records of Events and itineraries show troops movements and give histories of the units.  Confederate transcriptions include the officer rosters which usually accompanied the records. Listed by states, alphabetically, with organizations numbered and named, grouped by organization type.  Records of Events were transcribed from the National Archives microfilm M594 (Union, 225 rolls) and M861 (Confederate, 74 rolls).

Volume

Serial No.

Contents

1

Serial no. 13

Alabama troops (Union and Confederate)

2

Serial no. 14

Arizona troops (Confederate); Arkansas troops (Union and Confederate)

3

Serial no. 15

California troops (Union); Colorado troops (Union); Connecticut troops (Union, 1st-8th Regiments)

4

Serial no. 16

Connecticut troops (Union, 9th-28th Regiments); Dakota troops (Union); Delaware troops (Union)

5

Serial no. 17

District of Columbia troops (Union); Florida troops (Union and Confederate); Georgia troops (Union and Confederate, Calvary and Artillery)

6

Serial no. 18

Georgia troops (Confederate Infantry 1st-46th regiments)

7

Serial no. 19

Georgia troops (Confederate Infantry 47th-misc. units); Illinois troops (Union Cavalry 1st-9th)

8

Serial no. 20

Illinois troops (Union Cavalry 10th-Misc., Artillery, Infantry 7th-12th)

9

Serial no. 21

Illinois troops (Union Infantry 13th-24th)

10

Serial no. 22

Illinois troops (Union Infantry 25th-37th)

11

Serial no. 23

Illinois troops (Union Infantry 38th-49th)

12

Serial no. 24

Illinois troops (Union Infantry 50th-60th)

13

Serial no. 25

Illinois troops (Union Infantry 73rd-100th)

14

Serial no. 26

Illinois troops (Union Infantry 101st-134th)

15

Serial no. 27

Illinois troops (Union Infantry 135th-156th, Misc.); Indiana troops (Union Cavalry 1st-13th, Misc.; Artillery 1st-Misc.; Infantry 6th-8th)

16

Serial no. 28

Indiana troops (Union Infantry 9th-32nd)

17

Serial no. 29

Indiana troops (Union Infantry 33rd-68th

18

Serial no. 30

Indiana troops (Union Infantry 69th-Misc.)

19

Serial no. 31

Iowa troops (Union Cavalry 1st-9th; Artillery 1st-Misc.; Infantry 1st-9th)

20

Serial no. 32

Iowa troops (Union Infantry 10th-33rd)

21

Serial no. 33

Iowa troops (Union Infantry 34th-48th); Kansas troops (Union Cavalry 2nd-16th; Artillery; Infantry); Kentucky troops (Union Cavalry 1st-11th)

22

Serial no. 34

Kentucky troops (Union Cavalry 12th-Misc.; Artillery; Infantry 1st-Misc.)

23

Serial no. 35

Kentucky troops (Confederate Cavalry 1st-Misc.; Artillery; Infantry 1st-9th); Louisiana troops (Union Cavalry 1st-Misc.; Infantry 1st-2nd); Louisiana troops (Confederate Cavalry 1st-Misc.; Artillery; Infantry 1st-4th)

24

Serial no. 36

Louisiana troops (Confederate Infantry 5th-Misc.)

25

Serial no. 37

Maine troops (Union Cavalry 1st-2nd; Artillery; Infantry 1st-27th)

26

Serial no. 38

Maine troops (Union Infantry 28th-Misc.); Maryland troops (Union Cavalry 1st-Misc.; Artillery 1st-Misc.; Infantry 1st-Misc.)

27

Serial no. 39

Maryland troops (Confederate Cavalry; Artillery; Infantry); Massachusetts troops (Union Cavalry; Artillery, Heavy; Artillery, Light; Infantry 1st-11th)

28

Serial no. 40

Massachusetts troops (Infantry 10th-30th)

29

Serial no. 41

Massachusetts troops (Infantry 31st-Misc.); Michigan troops (Union Cavalry 1st-4th)

30

Serial no. 42

Michigan troops (Union Cavalry 5th-Misc.; Artillery; Engineers and Mechanics; Sharpshooters; Infantry 1st-9th)

31

Serial no. 43

Michigan troops (Union Infantry 10th-Misc.); Minnesota troops (Union Cavalry; Artillery; Infantry 1st-4th)

32

Serial no. 44

Minnesota troops (Union Infantry 5th-11th); Mississippi troops (Union Infantry); Mississippi troops (Confederate Cavalry; Artillery; Infantry 1st-3rd)

33

Serial no. 45

Mississippi troops (Confederate Infantry 4th-30th)

34

Serial no. 46

Mississippi troops (Confederate Infantry 31st-Independent); Missouri troops (Union Cavalry 1st-4th)

35

Serial no. 47

Missouri troops (Union Cavalry 4th State Militia-Misc.)

36

Serial no. 48

Missouri troops (Union Artillery; Engineers; Infantry)

37

Serial no. 49

Missouri troops (Union Infantry 12th-40th)

38

Serial no. 50

Missouri troops (Union Infantry 41st-Misc.); Missouri troops (Confederate Cavalry 1st-Misc.; Artillery; Infantry 1st-Misc.); Nebraska troops (Union Cavalry 1st-1st Battalion)

39

Serial no. 51

Nebraska troops (Union Cavalry 2nd-Misc.); Nevada troops (Union Cavalry 1st Battalion; Infantry 1st Battalion); New Hampshire troops (Union Cavalry 1st; Artillery 1st Heavy; Infantry 1st-18th, Misc.); New Jersey troops (Union Cavalry 1st-3rd, Van Reypen's Co.; Artillery 1st-5th; Infantry 1st-2nd)

40

Serial no. 52

New Jersey troops (Union Infantry 3rd-40th)

41

Serial no. 53

New Mexico troops (Union Cavalry; Infantry); New York troops (Union Cavalry; Heavy Artillery 2nd-7th)

42

Serial no. 54

New York troops (Union Heavy Artillery 8th-1st Marine; Light Artillery; Infantry 1st-9th)

43

Serial no. 55

New York troops (Union Infantry 10th-47th State Militia)

44

Serial no. 56

New York troops (Union Infantry 48th-75th)

45

Serial no. 57

New York troops (Union Infantry 76th-102nd National Guard)

46

Serial no. 58

New York troops (Union Infantry 103rd-139th)

47

Serial no. 59

New York troops (Union Infantry 140th-Misc.)

48

Serial no. 60

North Carolina troops (Union Infantry); North Carolina troops (Confederate Cavalry; Artillery; Infantry 1st-25th)

49

Serial no. 61

North Carolina troops (Confederate Infantry 26th-Misc.); Ohio troops (Union Cavalry 1st-6th)

50

Serial no. 62

Ohio troops (Union Cavalry 7th-Misc.; Artillery; Infantry 5th Sharpshooters-6th Reserve Militia)

51

Serial no. 63

Ohio troops (Union Infantry 7th-27th)

52

Serial no. 64

Ohio troops (Union Infantry 28th-54th)

53

Serial no. 65

Ohio troops (Union Infantry 55th-76th)

54

Serial no. 66

Ohio troops (Union Infantry 77th-103rd)

55

Serial no. 67

Ohio troops (Union Infantry 104th-142nd National Guard)

56

Serial no. 68

Ohio troops (Union Infantry 143rd National Guard-Misc.); Oregon troops (Union Cavalry 1st; Infantry 1st); Pennsylvania troops (Union Cavalry 1st Bttn-6th)

57

Serial no. 69

Pennsylvania troops (Union Cavalry 7th-Misc; Artillery 2nd Heavy)

58

Serial no. 70

Pennsylvania troops (Union Artillery 2nd Prov.-Misc.; Infantry 1st Res.-20th Emergency)

59

Serial no. 71

Pennsylvania troops (Union Infantry 21st-56th)

60

Serial no. 72

Pennsylvania troops (Union Infantry 57th-88th)

61

Serial no. 73

Pennsylvania troops (Union Infantry 90th-115th)

62

Serial no. 74

Pennsylvania troops (Union Infantry 116th-165th)

63

Serial no. 75

Pennsylvania troops (Union Infantry 166th -Misc.); Rhode Island troops (Union Cavalry, Artillery, Infantry, Independent Hospital Guards)

64

Serial no. 76

South Carolina troops (Confederate Cavalry 1st-Misc.; Artillery; Infantry 1st-11th)

65

Serial no. 77

South Carolina troops (Confederate Infantry 11th Reserves-27th, Misc.); Tennessee troops (Union Cavalry, Artillery, Infantry)

66

Serial no. 78

Tennessee troops (Confederate Cavalry, Artillery, Infantry 1st-23rd)

67

Serial no. 79

Tennessee troops (Confederate Infantry 24th-154th, Misc.); Texas troops (Union Cavalry); Texas troops (Confederate Cavalry 1st-12th)

68

Serial no. 80

Texas troops (Confederate Cavalry 13th-37th, Misc.; Artillery; Infantry 1st-15th)

69

Serial no. 81

Texas troops (Confederate Infantry 18th-Misc.); Vermont troops (Union); Virginia troops (Union); Virginia troops (Confederate Cavalry 1st-10th)

70

Serial no. 82

Virginia troops (Confederate Cavalry 11th-Misc.; Artillery; Infantry 1st-4th)

71

Serial no. 83

Virginia troops (Confederate Infantry 4th Reserves-25th)

72

Serial no. 84

Virginia troops (Confederate Infantry 25th Battalion-64th Militia)

73

Serial no. 85

Virginia troops (Confederate Militia-Misc); Confederate troops (Cavalry; Artillery; Infantry; Indian units; Miscellaneous units); Washington Territory troops (Union); West Virginia troops (Union Cavalry 1st-3rd)

74

Serial no. 86

West Virginia troops (Union Cavalry 4th-7th; Artillery; Infantry); Wisconsin troops (Union Cavalry 1st-4th)

75

Serial no. 87

Wisconsin troops (Union Artillery; Infantry 1st-14th)

76

Serial no. 88

Wisconsin troops (Union Infantry 15th-40th

77

Serial no. 89

Wisconsin troops (Union Infantry 41st-53rd; U.S. Colored troops (Union Cavalry; Artillery; Infantry 1st-41st)

78

Serial no. 90

U.S. Colored troops (Union Infantry 42nd-92nd)

79

Serial no. 91

U.S. Colored troops (Union Infantry 93rd-Brigade Band no. 2); U.S. Volunteers (Union); U.S. Veteran Reserve Corps (Union 1st-14th)

80

Serial no. 92

U.S. Veteran Reserve Corps (Union 15th-Unassigned regiment); Miscellaneous Units; Indian Home Guards; Mississippi Marine Brigade; Pioneer Brigade (Army of the Cumberland).

Part III: Correspondence

Essential correspondence omitted from the original Official Records.

Volume

Serial No.

Contents

1

Serial no. 93

Union: April 30-December 26, 1861; Confederate: January 3-December 30, 1861; Union: January-July 28, 1962; Confederate: January-February 28, 1862

2

Serial no. 94

Union: August 8-December 24, 1862; Confederate: March 1-December 29, 1862

3

Serial no. 95

Union: January 1-December 22, 1863; Confederate: January 1-December 19, 1963; Union: February 10-December 29, 1864; Confederate: January-December 31, 1864; Union: January 2-June 6, 1865; Confederate: January 7-May 10, 1865.

Part IV: Index

Includes more than 1,000,000 entries and cross-references for all of the Supplement materials.

Volume

Serial No.

Contents

1-5

Serial nos. 96-100

Index - 5 Volumes